Accession Number : ADA288621

Title :   Intermodulation Interference (IMI) Testing of Composite Materials.

Descriptive Note : Final rept.,

Corporate Author : NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA

Personal Author(s) : Rockway, J. W. ; Logan, J. C. ; Schukantz, J. H. ; Danielson, T. A.

PDF Url : ADA288621

Report Date : SEP 1994

Pagination or Media Count : 16

Abstract : With the possibility of the large-scale use of graphite-bearing composites for topside structures and masts, some concern has been expressed as to whether these materials might be intermodulation interference (IMI) generators. To resolve this question, tests were performed to compare the relative signal levels of intermodulation generated by two graphite fiber composite material samples to a steel sample and to a brass sample. The graphite fiber composite material samples were representative of the materials that will be used in the Advanced Enclosed Mast/Sensor (AEM(S) System. The results of these tests were evaluated in terms of the potential of graphite-loaded composite structures to be significant generators of IMI on board Navy ships. With the possibility of the large-scale use of graphite-bearing composites for topside structures and masts, some concern has been expressed as to whether these materials might be intermodulation interference (IMI) generators. To resolve this question, tests were performed to compare the relative signal levels of intermodulation generated by two graphite fiber composite material samples to a steel sample and to a brass sample. The graphite fiber composite material samples were representative of the materials that will be used in the Advanced Enclosed Mast/Sensor (AEM/S) System. The results of these tests were evaluated in terms of the potential of graphite-loaded composite structures to be significant generators of IMI on board Navy ships.

Descriptors :   *DIELECTRIC PROPERTIES, *CARBON REINFORCED COMPOSITES, *RADIOFREQUENCY INTERFERENCE, NAVAL VESSELS, FIBER REINFORCED COMPOSITES, GRAPHITE, CARBON FIBERS, SHIPBOARD, COMMUNICATION AND RADIO SYSTEMS, INTERMODULATION, HOUSINGS.

Subject Categories : Electromagnetic Shielding
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE